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NEES-Pile: Experimental and Computational Study of Pile Foundations Subjected to Liquefaction-Induced Lateral Spreading COMPARISON BETWEEN CENTRIFUGE AND REAL SCALE MODEL TESTS: LG0 - SG1 By Student: Marcelo Gonzalez Professor: Tarek Abdoun Rensselaer Polytechnic Institute August 20 th, 2007

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Table of Contents BUFFALO REAL SCALE Water, 1 cp K= 1E-2 cm/sec DR = 55% TABLE OF CONTENTS: 1.SIMULATION OF LG0 1.1Model configuration, soil properties, Instrumentation and centrifuge model preparation. 1.2Input acceleration. 1.3Time History responses. 1.4Stress – Strain responses. 2.SIMULATION OF LG0 2.1Model configuration, soil properties, Instrumentation and centrifuge model preparation. 2.2Input acceleration. 2.3Time History responses and profiles of the data. 2.4Stress – Strain responses. 3.DISCUSSION

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SIMULATION LG0 BUFFALO REAL SCALE Water, 1 cp K= 1E-2 cm/sec DR = 55% SIMULATION OF LG0

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Soil Properties and Instrumentation LG0 D 50 = mm D 10 = mm FC = 0.1% e min = e max = Gs = K = 1 x cm/sec, 40%DR (Gonzalez M., 2006)

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Model Configuration LG0 Pore Pressure LVDT Accelerometer X Accelerometer Y 0 cm 21.5 cm (5.38 m) 19 cm (4.75 m) 14 cm (3.50 m) 6.0 cm (1.50 m) Left Right 7.5 cm (1.88 m) High Speed Camera

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Model Preparation LG0 BUFFALO REAL SCALE sand Latex Membrane acelerometer Dry sand pluviation method Ottawa sand Outer chamber (vacuum = 100 kPa) Outer (100 kPa) Latex Membrane acelerometer Model Saturation System Ottawa sand Chamber Vacuum Inner (90 kPa)

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Results: Input Acceleration LG0 INPUT ACCELERATION TIME CONSIDERED IN THE ANALISIS

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Results: Acceleration in the rings LG0 INPUT ACCELERATION ACR5 ACR4 ACR3 ACR2 ACR1

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Results: Acceleration in the soil LG0 INPUT ACCELERATION ACCR5 ACCR4 ACCR3 ACCR2 ACCR1

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Results: Excess Pore Water Pressure LG0 INPUT ACCELERATION PWC5,PWU3 PWC4, PWD2 PWC3, PWU2 PWC2, PWD1 PWC1, PWU1

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Results: Excess Pore Water Pressure Dissipation LG0 INPUT ACCELERATION PWC5,PWU3 PWC4, PWD2 PWC3, PWU2 PWC2, PWD1 PWC1, PWU1

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Results: Lateral Displacement in the soil LG0 INPUT ACCELERATION LVR5 LVR4 LVR3 LVR2 LVR1

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Results: Stress – Strain Loops LG0 0-12sec GSI 1.0 Strain – Stress Loops Calculated by considering Soil Accelerometers and Inertia of the ring correction

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Results: Shear Wave Velocity LG0 Centrifuge University of Buffalo No ring inertia effect No degradation effect No ring inertia effect No degradation effect A. Elmekati, 2007

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SIMULATION SG1 SIMULATION OF SG1

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Results: Strain – Stress Loops LG0 The same configuration and preparation method than LG0 was used to create SG1. The only difference was the inclination angle. Model inclination angle = 2 degrees Prototype inclination angle = 5 degrees

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Results: Input Acceleration SG1

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Results: Acceleration in the rings SG1 2.25m, ACR4 5.38m, ACR1 4.75m, ACR2 3.50m, ACR3 1.50m, ACR5 INPUT ACCELERATION

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Results: Acceleration in the soil SG1 2.25m, ACCR4 5.38m, ACCR1 4.75m, ACCR2 3.50m, ACCR3 1.50m, ACCR5 INPUT ACCELERATION

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Results: Excess Pore Water Pressure SG1 2.25m, PWC4 5.38m, PWC1 4.75m, PWC2 3.50m, PWC3 1.50m, PWC5 INPUT ACCELERATION

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Results: Lateral Displacement in the soil SG1 2.25m, LVR4 5.38m, LVR1 4.75m, LVR2 3.50m, LVR3 1.50m, LVR5 INPUT ACCELERATION

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Results: Lateral Displacement in the soil SG1 2.25m, LVR4 5.38m, LVR1 4.75m, LVR2 3.50m, LVR3 1.50m, LVR5 INPUT ACCELERATION Event1 (E1): Between 5.30 and 5.6 sec Event2 (E2): Between 5.75 and 6.0 sec Event3 (E3): Between 6.20 and 7.3 sec Event4 (E4): Between 25.0 and 30.0 sec E1 E2 E3

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Results: Lateral Displacement in the soil SG1 2.25m, LVR4 5.38m, LVR1 4.75m, LVR2 3.50m, LVR3 1.50m, LVR5 INPUT ACCELERATION Event1 (E1): Between 5.30 and 5.6 sec Event2 (E2): Between 5.75 and 6.0 sec Event3 (E3): Between 6.20 and 7.3 sec Event4 (E4): Between 25.0 and 30.0 sec E4

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Results: Lateral Displacement in the soil SG1

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4sec5.5sec 6sec27sec

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Results: Stress – Strain Loops SG1 GSI 1.0 Strain – Stress Loops Calculated by considering Soil Accelerometers and Inertia of the ring correction SAA NO RING CORRECTION

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Results: Shear Wave Velocity SG1 centrifuge University of Buffalo A.Elmekati, 2007

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Discusion SG1 Thank you

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